A motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/ hr. His average speed for the whole journey in km/hr is-

A motorist travels to a place 150 km away at an average speed of 50 km

1.	A motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/ hr. His average speed for the whole journey in km/hr is-
A.	5 km/hr
B.	7 km/hr
C.	7.5 km/hr
D.	0 km/hr
Answer» D. 0 km/hr

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A motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/ hr. His average speed for the whole journey in km/hr is-

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